/*
 * Copyright (c) 2006, Swedish Institute of Computer Science.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the Institute nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * This file is part of the Contiki operating system.
 *
 */

 /**
  * \file
  *         Callback timer implementation
  * \author
  *         Adam Dunkels <adam@sics.se>
  */

  /**
   * \addtogroup ctimer
   * @{
   */

#include "sevenbox/fakeos/fakeos.h"
#include "sevenbox/fakeos/ctimer.h"

#if FAKEOS_USE_CTIMER

#define DEBUG 0
#if DEBUG
#include <stdio.h>
#define PRINTF(...) printf(__VA_ARGS__)
#else
#define PRINTF(...)
#endif

   /*---------------------------------------------------------------------------*/
PROCESS(ctimer_process, "Ctimer process");
PROCESS_THREAD(ctimer_process, ev, data)
{
    struct ctimer* c;
    PROCESS_BEGIN();

    struct ctimer_private* priv = (struct ctimer_private*)&ctimer_process.ctimer_private;

    for (c = priv->ctimer_list.head; c != NULL; c = c->next){
        etimer_set(&c->etimer, c->etimer.timer.interval);
    }
    priv->initialized = 1;

    while (1){
        PROCESS_YIELD_UNTIL(ev == PROCESS_EVENT_TIMER);
        for (c = priv->ctimer_list.head; c != NULL; c = c->next){
            if (&c->etimer == data){
                slist_remove_node(priv->ctimer_list, c);
                PROCESS_CONTEXT_BEGIN(c->p->context, c->p);
                if (c->f != NULL){
                    c->f(c->ptr);
                }
                PROCESS_CONTEXT_END(c->p->context, c->p);
                break;
            }
        }
    }
    PROCESS_END();
}
/*---------------------------------------------------------------------------*/
void
ctimer_init(struct fakeos_process_context* context)
{
    context->ctimer_private.initialized = 0;
    slist_init(contxt->ctimer_private.ctimer_list);
    process_start(context, &ctimer_process, NULL);
}
/*---------------------------------------------------------------------------*/
#if 0
void
ctimer_set(struct ctimer* c, clock_time_t t,
    void (*f)(void*), void* ptr)
{
    ctimer_set_with_process(c, t, f, ptr, PROCESS_CURRENT());
}
#endif

/*---------------------------------------------------------------------------*/
void
ctimer_set_with_process(struct ctimer* c, clock_time_t t,
    void (*f)(void*), void* ptr, struct process* p)
{
    PRINTF("ctimer_set %p %u\n", c, (unsigned)t);
    c->p = p;
    c->f = f;
    c->ptr = ptr;
    if (initialized){
        PROCESS_CONTEXT_BEGIN(ctimer_process.context, &ctimer_process);
        etimer_set(&c->etimer, t);
        PROCESS_CONTEXT_END(ctimer_process.context, &ctimer_process);
    }
    else{
        c->etimer.timer.interval = t;
    }

    list_add(ctimer_list, c);
}
/*---------------------------------------------------------------------------*/
void
ctimer_reset(struct ctimer* c)
{
    if (initialized){
        PROCESS_CONTEXT_BEGIN(ctimer_process.context, &ctimer_process);
        etimer_reset(&c->etimer);
        PROCESS_CONTEXT_END(ctimer_process.context, &ctimer_process);
    }

    list_add(ctimer_list, c);
}
/*---------------------------------------------------------------------------*/
void
ctimer_restart(struct ctimer* c)
{
    if (initialized){
        PROCESS_CONTEXT_BEGIN(ctimer_process.context, &ctimer_process);
        etimer_restart(&c->etimer);
        PROCESS_CONTEXT_END(ctimer_process.context, &ctimer_process);
    }

    list_add(ctimer_list, c);
}
/*---------------------------------------------------------------------------*/
void
ctimer_stop(struct ctimer* c)
{
    if (initialized){
        etimer_stop(&c->etimer);
    }
    else{
        c->etimer.next = NULL;
        c->etimer.p = PROCESS_NONE;
    }
    list_remove(ctimer_list, c);
}
/*---------------------------------------------------------------------------*/
int
ctimer_expired(struct ctimer* c)
{
    struct ctimer* t;
    if (initialized){
        return etimer_expired(&c->etimer);
    }
    for (t = list_head(ctimer_list); t != NULL; t = t->next){
        if (t == c){
            return 0;
        }
    }
    return 1;
}

#endif
/*---------------------------------------------------------------------------*/
/** @} */
